Needle for talking-machines and method of making the same.



L1 K. SCOTFOHD.

NEEDLE FOR TALKING MACHINES AND METHOD 0F MAKING THE SAME. APPLICATIQNFILED MAR.28.1914.

1,163567. Patented De@ 7, 1915.

W239i 7. i

STATES PATENT (NEIGE,v

LOUIS K. SCOTFORD, CHICAGO, ILLINOIS.

NEEDLE FOR TALKING-MACHINES AND MTHOD OF MAKING THE SAME.

Specification of Letters Patent.

Patented Dec. 7, 1915b 'Application mea March 2s, 1914. sriai No.827,951.

. To all whom t may concern.'

Be it knownthat I, LOUIS K. SoorroRD, a citizen of the United States,and a resident of Chicago, in the county of Cook andState of Illinois,have inventeddcertain ,new and useful )Improvements in Needles forTalking-Machines and Methods of Making the Same, of which the following1s a specification. W

This invention relates to improvements in needles for use in talkingmachines and method ofmaking the same.

The object of the invention is to produce a needle which will eliminate`the scratching and hissing noise so common in records that v have beenused for some time.

The invention consists of a needle formed of anyl desirable substance,such as vthe ordinary steel orv fiber needle, with its shank coated Witha deadening substancesuch, for example, as rubber, and in the preferredembodiment, the needle p ropf r is formed of fiber which is compressed,`un er heat in the act of vulcanizing thel rubber the shank. In thedrawings accompanL ing and forming part hereof.: Figurell' i aperspective view of a fiber needle Inadein accordance with my invention.FigJQ i @la vert-ical section .of the same. Fig. 3 is a tf'iew of'asteel needle having its shank coverrid with rubber, and Fig. 4 is adiagrammatic View illustrating a vulcanizing press ih which the needlemay be formed. Referring now 'to the details of the drawings bynumerals: l designates aY needle which may be made of the same substanceas the ordinary fiber. needle now so commonly' used.- AIn its preferredembodiment this needle hasits shank 2 of smaller sizev In the mostdesirable .form of my. inven..

tion the iiber nee(lle is compressed under heat inthe act ofvulcamzation. Fig. 4 shows a diagrammatic View of a press '1n which theneedle -may vbe vulcanized, although lt will be understood of coursethat in the actual press a number of needles may be vulcanizedsimultaneously. This vulcanizlng press may be formed of two steel molds7 and -8 between which is formed a trianguj y lar recess 9 to receive aneedle a little larger than the triangular recess so that when the pressis put under hydraulic pressure the needle is compressed into smallerspace While vulcanization is obtained and the fiber is .thoroughly driedand hardened. It will be noted that in vulcanizing the deadeningsubstance to the shank I not only accomplish the vulcanization but alsoderive the bene- .with some particularly loudbuzzy rerprds,

the scratching is greatly decreased. "55

I am aware that it has been proposed tei use deaden'ing substance in thesound boxes of talking machines but believe I 'am the first to produce aneedle having its own individual deadening surface. t()

What I claim as my invention is:

l. As an article of manufacture, a'n'eed .e for talking machinescomprising the neeo le proper having a deadening substance asnrub bervulcanized toits shank. l

2. As an article of manufacture, a needle for talking machinescomprising a body of compressed iber having a deadening substance asrubber vulcanized to its shank.

3'. The method of making a needle com- 90 prising the steps ofAproviding the needle with. a covering of rubber, and subjectingit toheat and pressure whereby the needle is compressed and the rubbervulcanized.

In testimony whereof I aix myfsignature in presence of two witnesses.

. LOUIS KQ SCOTFGRD. Witnesses:

F. M. BIELENBERG, i GHAS. A. LENDELMEGER.

